George goes on a shopping trip to the mall. He buys a new pair of jeans that cost $29.99 and 5 new shirts that are on sale for $6.50 each. When checking out, he pays an 8% sales tax for the 6 items of clothing. He later stops at a market and purchases a candy bar for $1.49, but does not have to pay sales tax at the market. Which equation would calculate how much George spends on his trip?   a. 1 + .08[$29.99 + 5($6.50)] + 1.49   b. 1.08($29.99 + $6.50) × 6 × 1.49   c. 1.08($29.99 + $6.50) + 1.49   d. 1.08[$29.99 + 5($6.50)] + 1.49

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.